Two-Dimensional Quantitative Imaging of a Gas Hydrate Bottom-Simulating Reflector

P085 TWO-DIMENSIONAL QUANTITATIVE IMAGING OF A GAS HYDRATE BOTTOM-SIMULATING REFLECTOR Summary 1 A. RIBODETTI S. OPERTO J.Y. COLLOT and W. AGUDELO UMR Géosciences ´ Azur 6526 IRD-CNRS-UNSA BP 48 F-06235 Ville franche-sur-mer To estimate the total amount of free gas present beneath the hydrate stability zone we design a processing sequence based on preserved amplitude prestack depth migration/inversion and on specific post-processing of the tomographic model. Preserved amplitude prestack depth migration/inversion is a fast and efficient tool to estimate seismic attributes such as velocity perturbations of shallow seismic reflectors. Due to the limited source bandwith and source-receiver aperture range geological